package com.zyn.qianwen.user.util;

import javax.servlet.http.HttpServletRequest;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.HashMap;

/**
 * 获取IP地址和电脑名称
 * @author zyn
 */
public class HttpGetIp {

    public static String getIpAddr(HttpServletRequest request){
        String ipAddress = request.getHeader("x-forwarded-for");
        if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("Proxy-Client-IP");
        }
        if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getRemoteAddr();
            if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){
                //根据网卡取本机配置的IP
                InetAddress inet=null;
                try {
                    inet = InetAddress.getLocalHost();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                }
                ipAddress= inet.getHostAddress();
            }
        }
        //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15
            if(ipAddress.indexOf(",")>0){
                ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));
            }
        }
        return ipAddress;
    }

    /**
     * 获取本地电脑ip地址
     * @return
     */
    public static HashMap getLocalIpAddress(){
        HashMap<Object, Object> map = new HashMap<>();
        //用于获取IP(因为是静态的所以不需要使用new来实例化
        InetAddress ip;
        String IP = null;
        try {
            //获取IP
            ip = Inet4Address.getLocalHost();
            //以字符串形式存储IP
            IP = ip.getHostAddress();
            //获取本机的名称
            String hostName = ip.getHostName();
            map.put("ip",IP);
            map.put("name",hostName);
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
        return map;
    }

    public static void main(String[] args) {
        System.out.println(getLocalIpAddress());
    }


}
